Urban coolness runs through Alexander Wang’s diffusion line, T by Alexander Wang. The San Francisco-born designer and winner of the CFDA/Vogue Fashion Fund Award launched the label in 2009, weaving together downtown hipness, Euro chicness, and a splash of ’90s grunge. The clothes, which favor soft knits and distressed cotton, are adored by models and style sophisticates for their low-key design and flowing fit.